Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=69c3683ca7fe066ecba9e8a0424c5abd258a5d58
Commit: 69c3683ca7fe066ecba9e8a0424c5abd258a5d58
Parent: b5c15fc004ac83b7ad280acbe0fd4bbed7e2c8d4
Author: Keiichi KII <[EMAIL PROTECTED]>
AuthorDate: Fri Feb 15 02:01:58 2008 -0800
Committer: David S. Miller <[EMAIL PROTECTED]>
CommitDate: Fri Feb 15 02:01:58 2008 -0800
netconsole: avoid null pointer dereference at show_local_mac()
This patch avoids a null pointer dereference when we read local_mac
for netconsole in configfs and shows default local mac address
value.
A null pointer dereference occurs when we call show_local_mac() via
local_mac entry in configfs before we setup the content of netpoll
using netpoll_setup().
Signed-off-by: Keiichi KII <[EMAIL PROTECTED]>
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
---
drivers/net/netconsole.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
index 31e047d..501e451 100644
--- a/drivers/net/netconsole.c
+++ b/drivers/net/netconsole.c
@@ -309,8 +309,8 @@ static ssize_t show_local_mac(struct netconsole_target *nt,
char *buf)
struct net_device *dev = nt->np.dev;
DECLARE_MAC_BUF(mac);
- return snprintf(buf, PAGE_SIZE, "%s\n",
- print_mac(mac, dev->dev_addr));
+ return snprintf(buf, PAGE_SIZE, "%s\n", dev ?
+ print_mac(mac, dev->dev_addr) : "ff:ff:ff:ff:ff:ff");
}
static ssize_t show_remote_mac(struct netconsole_target *nt, char *buf)
-
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